ARM64SecondTable Class Reference

ARM64 second level page table implementation. More...

#include <ARM64SecondTable.h>

Public Member Functions
MemoryContext::Result	map (Address virt, Address phys, Memory::Access)
	Map a virtual address to a physical address.
MemoryContext::Result	unmap (Address virt)
	Remove virtual address mapping.
MemoryContext::Result	translate (Address virt, Address *phys) const
	Translate virtual address to physical address.
MemoryContext::Result	access (Address virt, Memory::Access *access) const
	Get Access flags for a virtual address.

Private Member Functions
u32	flags (Memory::Access access) const
	Convert MemoryAccess to page table flags.

Private Attributes
u64	m_pages [512]
	Array of second level page table entries.

Detailed Description

ARM64 second level page table implementation.

Definition at line 40 of file ARM64SecondTable.h.

Member Function Documentation

access()

MemoryContext::Result ARM64SecondTable::access	(	Address	virt,
		Memory::Access *	access
	)		const

Get Access flags for a virtual address.

Parameters

virt	Virtual address to get Access flags for.
access	MemoryAccess object pointer.

Returns

Result code.

Definition at line 61 of file ARM64SecondTable.cpp.

References access(), contain_flags, Memory::Device, entry, Memory::InnerCached, MemoryContext::InvalidAddress, IS_PT_PAGE_TBL, L3_IDX, m_pages, PT_DEV, PT_NC, PT_OSH, PT_RO, PT_USER, Memory::Readable, MemoryContext::Success, Memory::Uncached, Memory::User, and Memory::Writable.

Referenced by access(), ARM64FirstTable::access(), flags(), and map().

flags()

u32 ARM64SecondTable::flags ( Memory::Access  access ) const

private

Convert MemoryAccess to page table flags.

Parameters

access

Memory access flags

Returns

Page table access flags

Definition at line 88 of file ARM64SecondTable.cpp.

References access(), Memory::Device, Memory::Executable, PT_AF, PT_DEV, PT_ISH, PT_KERNEL, PT_NC, PT_NX, PT_OSH, PT_RO, PT_USER, Memory::User, and Memory::Writable.

map()

MemoryContext::Result ARM64SecondTable::map	(	Address	virt,
		Address	phys,
		Memory::Access	access
	)

Map a virtual address to a physical address.

Entry inside the page table of a given virtual address.

Parameters

virt	Virtual address.
phys	Physical address.
access	Memory access flags.

Returns

Result code

Parameters

vaddr

Virtual Address.

Returns

Index of the corresponding page table entry.

Definition at line 30 of file ARM64SecondTable.cpp.

References access(), MemoryContext::AlreadyExists, flags, IS_PT_PAGE_TBL, L3_IDX, m_pages, PAGEMASK, PT_PAGE, and MemoryContext::Success.

Referenced by ARM64FirstTable::map().

translate()

MemoryContext::Result ARM64SecondTable::translate	(	Address	virt,
		Address *	phys
	)		const

Translate virtual address to physical address.

Parameters

virt	Virtual address to lookup as input
phys	Physical address for output.

Returns

Result code

Definition at line 50 of file ARM64SecondTable.cpp.

References MemoryContext::InvalidAddress, IS_PT_PAGE_TBL, L3_IDX, m_pages, PAGEMASK, and MemoryContext::Success.

Referenced by ARM64FirstTable::releaseRange(), ARM64FirstTable::releaseSection(), and ARM64FirstTable::translate().

unmap()

MemoryContext::Result ARM64SecondTable::unmap

(

Address

virt

)

Remove virtual address mapping.

Parameters

virt	Virtual address.

Returns

Result code

Definition at line 44 of file ARM64SecondTable.cpp.

References L3_IDX, m_pages, PT_NONE, and MemoryContext::Success.

Referenced by ARM64FirstTable::releaseRange(), and ARM64FirstTable::unmap().

Field Documentation

m_pages

u64 ARM64SecondTable::m_pages[512]

private

Array of second level page table entries.

Definition at line 100 of file ARM64SecondTable.h.

Referenced by access(), map(), translate(), and unmap().

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The documentation for this class was generated from the following files:

• lib/libarch/arm64/ARM64SecondTable.h
• lib/libarch/arm64/ARM64SecondTable.cpp